another firewall insulated

[DanH]

Contego works by forming a puffy char layer as an insulator. The char is very soft and fragile. Given 1~3 lbs/sec engine compartment airflow and sheet metal vibration the char will be destroyed as fast as it forms, meaning no insulation value.

Good stuff if you want to add fire resistance to your shop wall......

[DanH]

§ 23.1191 Firewalls.

(f) Compliance with the criteria for fireproof materials or components must be shown as follows:

(1) The flame to which the materials or components are subjected must be 2,000 ±150 °F.

(2) Sheet materials approximately 10 inches square must be subjected to the flame from a suitable burner.

(3) The flame must be large enough to maintain the required test temperature over an area approximately five inches square.

(g) Firewall materials and fittings must resist flame penetration for at least 15 minutes.

§ 23.1182 Nacelle areas behind firewalls.

Components, lines, and fittings, except those subject to the provisions of §23.1351(e), located behind the engine-compartment firewall must be constructed of such materials and located at such distances from the firewall that they will not suffer damage sufficient to endanger the airplane if a portion of the engine side of the firewall is subjected to a flame temperature of not less than 2000 °F for 15 minutes.

[scard]

Dan, step away from the computer and fabricate something cool with a stiff drink in your other hand .

[jthocker]

My head hurts!

[lostpilot28]

Originally Posted by DanH

Contego works by forming a puffy char layer as an insulator. The char is very soft and fragile. Given 1~3 lbs/sec engine compartment airflow and sheet metal vibration the char will be destroyed as fast as it forms, meaning no insulation value.

Good stuff if you want to add fire resistance to your shop wall......

C'mon Dan, it can't be that bad. I'd ask you to simulate another test with a sheet of SS and a giant fan to simulate the airflow, but I'd get another funny picture of a bunny (?) beating his head against a wall.

There has to be some value in using it...even if it only buys you a minute or two. Of course, I'm just hoping...

Maybe I'll buy a quart and attempt to validate your hypothesis on my own. Also, I'm not sure that on the center of the firewall you would get that kind of air movement. Maybe at the very bottom...(where the fire is...I know, I know)...

[hcccs]

Originally Posted by Steve Melton

air box stiffener made from alum tube.

Is this airbox stiffener needed?

[hendrik]

Originally Posted by scard

Dan, step away from the computer and fabricate something cool with a stiff drink in your other hand .

No, please don't step away. I find your tests extremely valuable, and while it might be inconvenient to hear for some, it is important that you share your results. Thanks a lot for that!

[pierre smith]

I know Dan personally and you can take what he says to the bank.

It may not be what you wanna hear but isn't that really what this site is for?

Best,

[Walt]

Originally Posted by hcccs

Is this airbox stiffener needed?

Only if you want to prevent cracks in the mounting plate

[tkatc]

Originally Posted by DanH

Nice!!!!!!!!